Malicious PDF — malware analysis report

Static analysis result for SHA-256 098f5b5caeaa660d…

MALICIOUS

PDF

73.0 KB Created: 2020-11-13 01:46:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc10af4f4d7654239524d54e15ff228 SHA-1: 5d4c4f69e3da4d2e7972a4195ec0f2c0b6b611b1 SHA-256: 098f5b5caeaa660d240c51aa281b6ac358dcc90ed8500c8b1c06935bd24c5aa4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. An external URI pointing to 'trafftec.ru' was extracted, which is likely the malicious destination. While no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest an attempt to redirect the user to a malicious site, consistent with phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafftec.ru/123?utm_term=love+triangle+animes
    • https://cdn-cms.f-static.net/uploads/4369187/normal_5f9ee8764a343.pdf
    • https://cdn-cms.f-static.net/uploads/4409403/normal_5fa5f48a19bf6.pdf
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5f8e638de1140.pdf
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5f94233c92af3.pdf
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5fa1889e6f365.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wonoti/bancassurance_agreement.pdf
    • https://s3.amazonaws.com/latufenaw/coleman_lazy_spa_manual.pdf
    • https://s3.amazonaws.com/debiwelof/coin_car_wash_for_sale_michigan.pdf
    • https://s3.amazonaws.com/gafedupeba/verbal_ability_test_with_answers.pdf
    • https://uploads.strikinglycdn.com/files/b61eab2f-a396-49c7-aa78-8bc77247fd06/13323950320.pdf
    • https://uploads.strikinglycdn.com/files/f977f2db-7c40-41ca-9c85-e2019f82338f/what_is_used_to_repair_big_brass_ins.pdf
    • https://uploads.strikinglycdn.com/files/99336e5c-a4d5-4bd6-9d46-b8b5331c4f7d/11374339358.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e386.bin
a27cb52b6cda0146c39a981246ec2c2c39d03a8886d5b3eaddf4fd40a7900ec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE386 5004 bytes
font_01_sfnt_off0000f47e.bin
55b92a9adbbacc0e25162ee2f47a56a2510372c3d199b40a69e2481845fb71a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF47E 10348 bytes

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